<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <label for="1"> 用户名: </label> <input type="text" id="1"><br>
    <label for="2"> 男：</label> <input type="radio" name=sex id="2">
    <label for="3"> 女 </label> <input type="radio" name="sex" id="3"> 
    
</body>
</html>